Improvement in spring-coiling machines



E. O. DIGEY. I Spring-Coiling, Machines.

No.197 ,460. v Patented Now-27,1877.

M nus, PuoTb-urHoeRAPuEn, wAs'MmsToN. n c.

UNITED. STATES P TENT- OFFICE.

ELMER o. DIOEY, on STERLING, ILLINOIS, Assrenon OF ONE-HALF HIS RIGHT TO HARRY o. ALBEE, or SAME PLACE.

IMPROVEMENT l'N SPRING-CQILING MACHINES.

Specification forming part of Letters Patent No. 197,460, dated November 27, 1877; application filed April 14,1877.

To all whom it may concern:

Be it known that I, ELMER G. DIGEY, of

the city of Sterling, in the county of White.

sides and State of Illinois, have invented a certain new and useful Machine for Making Springs; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and the letters of reference marked thereon, making a part of this specification.

The object of my invention is to provide a machine for making springs, either helical or spiral, as desired, and of any required diameter or pitch, from a rod or wire, so that the springs may be spun and cut off without stopping the machine.

Figure 1 is a rear-end elevation of the machine. Fig. 2 is a front-end elevation. Fig. 3 is a side view. Fig. 4 is a vertical transverse section, showing those parts of the machine which are at the right hand of the dotted line 00 00 across Fig. 3. Fig. 5 is a spiral spring.

A is the frame of the machine, which should be substantially constructed to resist the vibrations of the operating parts. B is the driving-pulley, which is hung to the roller 0, flom which motion is communicated to the operating parts by means of the train of gear shown in Fig. 1. O and O are live-rollers, by means of which the wire or rod is fed through while the spring is being formed. 0 is an idlerroller, hung in the yokes D and D, the inner ends of which articulate around the roller 0, the outer ends being pivoted to the connectingrods E and E. The yoke D is provided with a projection, a, which serves as a guide for the wire or rod as it passes through the rollers, causing it to enter at the right point. I) is a guide placed behind the rollers, which can be adjusted to give the desired pitch to the spring. F is a cutting-off chisel, hinged to the frame of the machine, as shown at c. G is a cam on the shaft H, and operates the chisel F.

To manufacture springs, the machine is set in motion by means of a belt on the pulley B, and the rod or wire which is to form the spring is inserted between the rollers O and G, which .Should be close enough together to feed the ma terial through. The idler-roller 0 being at its lowest point, and farthest from the live-rollers, the machine will now form the large part of the spiral, and as the wire passes through, the idler G will be slowly raised up toward the live rollers, reducing the diameter of the spring until ithas reached its minimum diamto sever it and allow the spring to drop out of the way of the following one.

To manufacture helical springs, or springs in which all the coils are of the same diameter, I placethe movable roller 0 at a point that will make the coils of the right diameter, then detach the connecting-rods E and E, and proceed as before described.

In the working machine, I provide a yielding box for one of the live-rollers, to prevent any unevenness of the wire from obstructing" its working. 7

I am aware that springs have been used for reacting the cutting-tool after it has severed the wire, the cutting being done by the tool under the direct action of a cam, forcing the cutting-tool slowly toward the wire in a direction at right angles to the cam-shaft, thereby making it necessary to stop the feed-rolls while the wire is being cut off. This I do not claim, as in my machine the cutting is done instantaneously by the tool in its reboimd after having been drawn back by the spiral bearing-surface on the cam G.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent, the following:

1. In a machine for making springs, the combination of two stationary feeding-rolls with an automatically-adjustable forming-roll, hung in yokes and vibrating on one of the sta* tionary rollers, substantially as specified.

2. The slotted vibrating yokes D and D,

carrying the forming-roll O", in combination with the connecting-rods E and E, and. driving-shaft H, for the purpose of giving to the roll Ofa vibratory movement, as set forth.

tively-driven feeding-rolls and; automaticallyadjustable forming-r011, in combination with the spring-anvil b and abruptly-terminating spiral cam-acted cutter, substantially as here- 7 inbefore specified.

In testimony whereof I have hereunto affixed my signature this 13th day of April, 1877, in

the presence of two witnesses.

ELMER G. DIOEY.

Witnesses:

J. MASON GoszLER, F. H. ScHoTT. 

